While the effects of the Zeeman coupling anisotropy due to the SO coupling have been extensively studied in the context of semiconductors, see, e.g., Ref. Winkler-book,
its consequences for the spin response of superconductors
have received relatively little attention in the literature. These consequences are expected to be profound, especially in the light of the recent developments in the field,[1]}, [2]}, [3]}, [4]}, [5]}, [6]}, [7]}
which demonstrated that the SO coupling can significantly affect the symmetry of the Bloch bands and invalidate the pseudospin picture[8]}, [9]} commonly used in the theory of unconventional superconductivity.
